package com.atguigu.eduservice.service.impl;

import com.atguigu.eduservice.entity.EduChapter;
import com.atguigu.eduservice.entity.EduVideo;
import com.atguigu.eduservice.entity.chapter.ChapterVo;
import com.atguigu.eduservice.entity.chapter.VideoVo;
import com.atguigu.eduservice.mapper.EduChapterMapper;
import com.atguigu.eduservice.service.EduChapterService;
import com.atguigu.eduservice.service.EduVideoService;
import com.atguigu.servicebase.exceptionHandler.GuliException;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.ArrayList;
import java.util.List;

/**
 * <p>
 * 课程 服务实现类
 * </p>
 *
 * @author testjava
 * @since 2020-10-30
 */
@Service
public class EduChapterServiceImpl extends ServiceImpl<EduChapterMapper, EduChapter> implements EduChapterService {
    @Autowired
    private EduVideoService videoService;

    @Override
    public List<ChapterVo> getChapterVideoByCourseId(String courseId) {
        QueryWrapper<EduChapter> wrapper = new QueryWrapper<>();
        wrapper.eq("course_id", courseId);
        List<EduChapter> eduChapterslist = baseMapper.selectList(wrapper);

        QueryWrapper<EduVideo> wrapperVideo = new QueryWrapper<>();
        wrapperVideo.eq("course_id", courseId);
        List<EduVideo> eduVideoList = videoService.list(wrapperVideo);

        List<ChapterVo> finalList = new ArrayList<>();
        for (int i = 0; i < eduChapterslist.size(); i++) {
            EduChapter eduChapter = eduChapterslist.get(i);
            ChapterVo chapterVo = new ChapterVo();
            BeanUtils.copyProperties(eduChapter, chapterVo);
            finalList.add(chapterVo);

            List<VideoVo> videoList = new ArrayList<>();
            for (int m = 0; m < eduVideoList.size(); m++) {
                EduVideo eduVideo = eduVideoList.get(m);
                if (eduVideo.getChapterId().equals(eduChapter.getId())) {
                    VideoVo videoVo = new VideoVo();
                    BeanUtils.copyProperties(eduVideo, videoVo);
                    videoList.add(videoVo);
                }
            }
            chapterVo.setChildren(videoList);

        }


        return finalList;
    }

    @Override
    public boolean deleteChapter(String chapterId) {
        QueryWrapper<EduVideo> wrapper = new QueryWrapper<>();
        wrapper.eq("chapter_id", chapterId);
        int count = videoService.count(wrapper);
       if(count>0){
           throw new GuliException(20001,"无法删除");
       }else{
           int result =baseMapper.deleteById(chapterId);
                   return result>0;
       }
    }

    @Override
    public void removeChapterByCourse(String id) {
     QueryWrapper<EduChapter> wrapper=new QueryWrapper<>();
     wrapper.eq("course_id",id);
     baseMapper.delete(wrapper);
     }
}